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Melamine

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Melamine Basic information

Product Name:
Melamine
CAS:
108-78-1
MF:
C3H6N6
MW:
126.12
EINECS:
203-615-4
Mol File:
108-78-1.mol
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Melamine Chemical Properties

Melting point:
354 °C
Boiling point:
224.22°C (rough estimate)
Density 
1.573
vapor pressure 
66.65 hPa (315 °C)
refractive index 
1.872
Flash point:
>110°C
storage temp. 
−20°C
solubility 
water: soluble25mg/mL, clear to slightly hazy, colorless
pka
5(at 25℃)
form 
Fine Crystalline Powder
color 
White
PH
7-8 (32g/l, H2O, 20℃)
Water Solubility 
3 g/L (20 ºC)
Merck 
14,5811
BRN 
124341
Stability:
Stable. Incompatible with strong acids, strong oxidizing agents. Nonflammable.
InChIKey
JDSHMPZPIAZGSV-UHFFFAOYSA-N
CAS DataBase Reference
108-78-1(CAS DataBase Reference)
NIST Chemistry Reference
1,3,5-Triazine-2,4,6-triamine(108-78-1)
EPA Substance Registry System
Melamine (108-78-1)
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Safety Information

Hazard Codes 
Xi,Xn
Risk Statements 
43-44-20/21
Safety Statements 
36/37
RIDADR 
3263
WGK Germany 
1
RTECS 
OS0700000
Autoignition Temperature
>600 °C
TSCA 
Yes
PackingGroup 
III
HS Code 
29336980
Hazardous Substances Data
108-78-1(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 3161 mg/kg LD50 dermal Rabbit > 1000 mg/kg

MSDS

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Melamine Usage And Synthesis

Chemical Properties

White Solid

Chemical Properties

Melamine is a white crystalline solid

Uses

A compound that forms synthetic resins with formaldehyde

Uses

Forms synthetic resins with formaldehyde.

Uses

It is used to make high-pressure laminating resins (e.g., decorative countertops), molded compounds (e.g., dinnerware), and surface coating resins (e.g., appliance finishes and automotive topcoats). Additional major products are textile and paper treatment resins. Miscellaneous uses include adhesive resins for gluing lumber, plywood, and flooring, and resins for leather tanning agents. Melamine, melamine cyanurate, other melamine salts, and guanidine compounds are currently the most used group of nitrogencontaining flame retardants. Melamine is used as a flame retardant additive for polypropylene and polyethylene. Melamine cyanurate is employed commercially as a flame retardant for polyamides and terephthalates.

Definition

ChEBI: A trimer of cyanamide, with a 1,3,5-triazine skeleton.

Definition

A white solid organic compound whose molecules consist of a sixmembered heterocyclic ring of alternate carbon and nitrogen atoms with three amino groups attached to the carbons. Condensation polymerization with methanal or other aldehydes produces melamine resins, which are important thermosetting plastics.

Definition

melamine: A white crystalline compound,C3N6H6. Melamine is a cycliccompound having a six-memberedring of alternating C and N atoms,with three NH2 groups. It can becopolymerized with methanal to givethermosetting melamine resins,which are used particularly for laminatedcoatings.

Production Methods

Melamine is prepared almost exclusively by the urea process—the action of ammonia on urea. It is produced worldwide.

General Description

Colorless to white monoclinic crystals or prisms or white powder. Sublimes when gently heated.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Melamine is incompatible with strong oxidizing agents and strong acids . Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.

Hazard

Toxic by ingestion, skin, and eye irritant. Questionable carcinogen.

Fire Hazard

Literature sources indicate that Melamine is nonflammable.

Contact allergens

Melamine-formaldehyde resin (MFR) results from condensation of melamine and formaldehyde. It is anactive ingredient of strong (reinforced) plasters, such as industrial or some dental plasters used for molding.It is also used as a textile finish resin. MFR acts as an allergen generally because of formaldehyde releasing (see Chap. 40)

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. An eye, skin, and mucous membrane irritant. Causes dermatitis in humans. Questionable carcinogen with experimental carcinogenic and tumorigenic data. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and CN-.

Potential Exposure

Manufactured from urea, melamine is used in the manufacture of plastics, melamineformaldehyde resins; rubber, synthetic textiles; laminates, adhesives, and molding compound

Carcinogenicity

A bioassay of melamine was conducted in rats and mice by NTP. Male F344 rats and B6C3F1 mice were administered melamine in their diets at concentrations of 2250 or 4500 ppm daily for 103 weeks.Female rats were fed 4500 or 9000 ppm melamine. At the end of 111 weeks, surviving animals were killed and examined.

Purification Methods

Crystallise Melamine from water or dilute aqueous NaOH. It sublimes at ~240o on prolonged heating. [Beilstein 26 I 74, 26 II 132, 26 III/IV 1253.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Melamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents such as hydrides, nitrides, alkali metals, and sulfides.

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J & K SCIENTIFIC LTD. Gold
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010-82848833- ;010-82848833-
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Shanghai Aladdin Bio-Chem Technology Co.,LTD Gold
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Guangzhou Helong Trading Co., Ltd. Gold
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Liaocheng Yuze Chemical Products Co., Ltd. Gold
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Email:
602919781@qq.com;602919781@qq.com
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